| CENTER HOLE DIAMETER | 18.084 INCHES MINIMUM AND 18.396 INCHES MAXIMUM |
| CROSS-SECTIONAL HEIGHT | 0.240 INCHES MINIMUM AND 0.280 INCHES MAXIMUM |
| HARDNESS RATING | 55.0 SHORE DUROMETER A MINIMUM AND 65.0 SHORE DUROMETER A MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | PB-16270,CAGEC 63900 MFR REF SINGLE MATERIAL RESPONSE |
| MATERIAL | RUBBER POLYISOPRENE SYNTHETIC CLASS IR |